Initial Approach

• A straightforward proxy

  • 1-1 connection mapping
  • SMTP-aware, sent tokens + context to plugins
    • Message body
    • Metatokens
      • Sender attempted nonexistent address
      • Sender attempted to relay
      • Sender used your hostname in HELO/EHLO
      • Sender is on a DNSBL

• Ran in a production environment in a small office for approximately two months

Notes: